"Dear Selena Gomez, you are by far one of the most beautiful, sexy, classy things on this planet. #Goddidgood #texasgirls," Clarkson wrote online.

It's unclear what prompted the lovefest, though perhaps Kelly admires how Gomez has refused to bash Justin Bieber in public and how she stood by Taylor Swift Sunday night after her BFF made some inappropriate remarks about Harry Styles.

Either way, Selena clearly appreciated the gesture, re-Tweeting it to her followers. We now have one word for you, ladies: DUET!